NASM is no longer used in SDL 1.3

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403811

configure.in

@@ -2576,7 +2576,6 @@ case "$host" in
         CheckDiskAudio
         CheckDummyAudio
         CheckWIN32
-        CheckNASM
         #SOURCES="$SOURCES $srcdir/src/video/gapi/*.c"
         #AC_DEFINE(SDL_VIDEO_DRIVER_GAPI)
         if test x$enable_video = xyes; then